-2=3+u

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Solution for -2=3+u equation: 



-2=3+u

We move all terms to the left:

-2-(3+u)=0

We add all the numbers together, and all the variables

-(u+3)-2=0

We get rid of parentheses

-u-3-2=0

We add all the numbers together, and all the variables

-1u-5=0

We move all terms containing u to the left, all other terms to the right

-u=5

u=5/-1

u=-5

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